At our small high school we use the (free) GMail school accounts for all students and faculty. Most of our users like to use Outlook. With Office 2003, we could maintain a master address book (PAB), which I could then distribute to everybody's Mail folder across our (Windows 2003 server) network. With the switch to Office 2007 I understand that I can no longer do this. After I distribute the address book, users must then delete their contacts folder, and then import the address book. Some users, frankly, can't be trusted to do this. Is there another solution whereby I can make sure that everyone has the latest address book? Is there an alternative mail reader that I could suggest that people use that would make it easier? how do others deal with this?

Software/Hardware used:
Windows XP Professional, Microsoft Office